TrojanDownloader_O97M_Ursnif_VA_MTB_2

YARA detection rule by roadwy

TrojanDownloader:O97M/Ursnif.VA!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Ursnif_VA_MTB_2{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.VA!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {3d 20 22 63 3a 5c 70 72 6f 67 72 61 6d 64 61 74 61 5c 52 72 4b 6b 69 2e 70 64 66 22 } 		$a_03_1 = {3d 20 43 72 65 61 74 65 4f 62 6a 65 63 74 28 [0-28] 28 33 29 20 26 20 22 2e 22 20 26 20 [0-28] 28 33 29 20 26 20 22 72 65 71 75 65 73 74 2e 35 2e 31 22 29 } 		$a_03_2 = {4f 70 65 6e 20 22 47 45 54 22 2c 20 [0-28] 28 [0-28] 29 2c 20 46 61 6c 73 65 } 		$a_01_3 = {53 75 62 20 41 75 74 6f 4f 70 65 6e 28 29 } 		$a_01_4 = {2e 65 78 65 63 20 28 59 42 78 73 50 29 } 	condition:
		((#a_01_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1) >=5
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

e334c467-63fb-4321-9920-0215f1c69cc1

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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